:root {
  --paper: #f8f0df;
  --paper-strong: #fff9ed;
  --ink: #2e261c;
  --muted: #75644f;
  --line: #dcc9a7;
  --green: #4d8b5c;
  --green-dark: #2f6442;
  --amber: #d7a94c;
  --signal-bg: #071815;
  --signal-bg-2: #0d2526;
  --signal-line: #74e5b3;
  --signal-warn: #f2cf69;
  --signal-lost: #f08f79;
  --radius: 8px;
  --shadow: 0 14px 36px rgba(79, 56, 25, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 0;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-width: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at top left, rgba(255, 246, 210, 0.8), transparent 34rem),
    var(--paper);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button,
textarea,
select {
  font: inherit;
}

a {
  color: var(--green-dark);
}

.site-header,
.site-footer {
  width: min(100% - 28px, 1500px);
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0 10px;
}

.brand {
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.site-nav,
.site-footer nav,
.button-row,
.next-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.site-nav a,
.site-footer a {
  color: var(--muted);
  font-size: 0.92rem;
  text-decoration: none;
}

.page-shell {
  display: grid;
  grid-template-columns: minmax(150px, 190px) minmax(0, 1040px) minmax(150px, 190px);
  gap: 24px;
  width: min(100% - 28px, 1500px);
  margin: 0 auto 28px;
  align-items: start;
}

.ad-rail {
  position: sticky;
  top: 14px;
  min-height: 320px;
  border: 1px dashed #ceb98f;
  border-radius: var(--radius);
  color: #9a835f;
  display: grid;
  place-items: center;
  background: rgba(255, 249, 235, 0.58);
  font-size: 0.9rem;
}

.main-column {
  min-width: 0;
}

.mode-title,
.control-bar,
.input-panel,
.metrics-grid,
.result-panel,
.related-panel,
.prompt-list {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 249, 237, 0.92);
  box-shadow: var(--shadow);
}

.mode-title {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 18px;
  padding: 14px 18px;
  margin-bottom: 10px;
}

.eyebrow {
  margin: 0;
  color: var(--green-dark);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.mode-title h1 {
  margin: 0 0 2px;
  font-size: clamp(1.55rem, 2.5vw, 2.2rem);
  line-height: 1.08;
}

.mode-title p:last-child {
  margin: 0;
  color: var(--muted);
}

.control-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  padding: 10px 12px;
  margin-bottom: 12px;
}

.control-field,
.toggle-field {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.93rem;
}

select,
textarea {
  border: 1px solid #cbb58c;
  border-radius: 7px;
  background: #fffdf6;
  color: var(--ink);
}

select {
  min-height: 36px;
  padding: 0 28px 0 10px;
}

button {
  min-height: 38px;
  padding: 0 15px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 700;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.56;
}

.primary-button {
  background: var(--green);
  color: #fffdf7;
  border-color: var(--green-dark);
}

.ghost-button {
  background: #fff8e9;
  color: var(--green-dark);
  border-color: #cbb58c;
}

.signal-panel {
  overflow: hidden;
  border: 1px solid #173d35;
  border-radius: var(--radius);
  background: linear-gradient(160deg, #06120f, #0d2526 62%, #142d24);
  box-shadow: 0 18px 42px rgba(20, 46, 40, 0.25);
}

.status-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 50px;
  padding: 10px 14px;
  color: #dffbe9;
  border-bottom: 1px solid rgba(122, 225, 177, 0.22);
  background: rgba(5, 17, 16, 0.76);
  white-space: normal;
}

.status-strip strong {
  color: var(--signal-line);
  font-size: 0.95rem;
  min-width: max-content;
}

.status-strip span {
  font-size: 0.92rem;
}

.status-strip.is-warn strong {
  color: var(--signal-warn);
}

.status-strip.is-lost strong {
  color: var(--signal-lost);
}

.status-strip.is-synced strong,
.status-strip.is-complete strong {
  color: #8df0cf;
}

.wave-stage {
  position: relative;
  height: clamp(360px, 48vh, 520px);
  overflow: hidden;
}

#wave-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.stage-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 8px;
  text-align: center;
  color: #dffbea;
  pointer-events: none;
  text-shadow: 0 0 18px rgba(116, 229, 179, 0.34);
}

.stage-overlay[hidden] {
  display: none;
}

.stage-overlay strong {
  font-size: clamp(1.35rem, 4vw, 2.65rem);
  letter-spacing: 0.08em;
}

.signal-meter {
  --signal-left: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 52px;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 9px 14px 12px;
  color: #dffbea;
  border-top: 1px solid rgba(122, 225, 177, 0.2);
  background: rgba(4, 14, 13, 0.78);
}

.signal-meter[hidden] {
  display: none;
}

.signal-meter span,
.signal-meter strong {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.signal-meter strong {
  justify-self: end;
  color: #dffbea;
}

.signal-meter-track {
  min-width: 0;
  height: 10px;
  overflow: hidden;
  border: 1px solid rgba(144, 238, 196, 0.28);
  border-radius: 999px;
  background:
    linear-gradient(90deg, rgba(240, 143, 121, 0.15), rgba(242, 207, 105, 0.13), rgba(116, 229, 179, 0.14)),
    rgba(1, 8, 7, 0.62);
  box-shadow: inset 0 0 14px rgba(0, 0, 0, 0.42);
}

.signal-meter-track i {
  display: block;
  width: var(--signal-left);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #7af0c5, #b8f2a3);
  box-shadow: 0 0 14px rgba(116, 229, 179, 0.34);
  transition: width 120ms linear, background 220ms ease, box-shadow 220ms ease;
}

.signal-meter.is-mid .signal-meter-track i {
  background: linear-gradient(90deg, #f2cf69, #b8f2a3);
  box-shadow: 0 0 13px rgba(242, 207, 105, 0.3);
}

.signal-meter.is-low .signal-meter-track i {
  background: linear-gradient(90deg, #f08f79, #f2cf69);
  box-shadow: 0 0 13px rgba(240, 143, 121, 0.3);
}

.input-panel {
  margin-top: 12px;
  padding: 12px;
}

.input-heading {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.input-heading h2 {
  margin: 0;
  font-size: 1rem;
}

.input-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

#typing-input {
  display: block;
  width: 100%;
  min-height: 74px;
  padding: 12px;
  line-height: 1.45;
  resize: vertical;
  font-size: 1rem;
}

.next-row {
  justify-content: flex-end;
  margin-top: 10px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  padding: 12px;
  margin-top: 12px;
}

.metrics-grid.is-complete {
  display: none;
}

.metric-card {
  min-width: 0;
  padding: 10px;
  border: 1px solid #eadab9;
  border-radius: 7px;
  background: #fffdf7;
}

.metric-card span,
.result-grid span,
.share-box label {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.metric-card strong,
.result-grid strong {
  display: block;
  margin: 2px 0;
  font-size: 1.2rem;
}

.metric-card small,
.result-grid small {
  color: #8a765b;
  font-size: 0.76rem;
}

.result-panel,
.related-panel,
.prompt-list {
  margin-top: 14px;
  padding: 16px;
}

.result-panel.is-highlight {
  outline: 3px solid rgba(77, 139, 92, 0.28);
}

.result-panel h2,
.related-panel h2 {
  margin: 3px 0 6px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin: 14px 0;
}

.result-grid div {
  padding: 10px;
  border-radius: 7px;
  background: #fffdf6;
  border: 1px solid #eadab9;
}

.share-box textarea {
  width: 100%;
  margin: 8px 0 10px;
  padding: 10px;
  resize: vertical;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.related-grid > * {
  padding: 12px;
  border: 1px solid #eadab9;
  border-radius: 7px;
  background: #fffdf7;
  text-decoration: none;
}

.prompt-list summary {
  cursor: pointer;
  font-weight: 800;
}

.prompt-list ul {
  margin: 12px 0 0;
  padding-left: 1.2rem;
}

.site-footer {
  padding: 18px 0 28px;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0 0 8px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}

@media (max-width: 1180px) {
  .page-shell {
    grid-template-columns: minmax(0, 1fr);
    width: min(100% - 24px, 980px);
  }

  .ad-rail {
    display: none;
  }
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .mode-title {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 12px;
  }

  .control-bar {
    align-items: stretch;
  }

  .control-field,
  .toggle-field,
  .control-bar button {
    width: 100%;
    justify-content: space-between;
  }

  .control-field select {
    flex: 1;
    max-width: 180px;
  }

  .status-strip {
    gap: 5px 9px;
    align-items: flex-start;
    flex-wrap: wrap;
    min-height: 58px;
  }

  .status-strip strong {
    width: 100%;
  }

  .wave-stage {
    height: 318px;
  }

  .metrics-grid,
  .result-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

  #typing-input {
    min-height: 72px;
    font-size: 16px;
  }
}

@media (max-width: 420px) {
  .site-header,
  .site-footer,
  .page-shell {
    width: min(100% - 18px, 100%);
  }

  .wave-stage {
    height: 300px;
  }
}